Campbell Scientific SDM-SIO1 Serial Input/Output Module - Manual (Page 12)

SDM-SIO1 Serial Input/Output Module
TABLE 3-1. SDM Address Settings
Rotary Switch
Position
SDM Address SerialOpen Command
Comm. Port Number
0 0 32
1 1 33
2 2 34
3 3 35
4 4 36
5 5 37
6 6 38
7 7 39
8 8 40
9 9 41
A 10 42
B 11 43
C 12 44
D 13 45
E 14 46
F (1) 15 (1) 47 (1)
(1) Address ‘F’ is not available as it’s the broadcast address. Setting this
address will result in the SDM-SIO1 having an address of ‘0’ not ‘F’.
3.1 Connections
Connection to the SDM-SIO1 is achieved via the 15 terminals arranged along
the top of the unit. The terminals are spring loaded providing an easy and
reliable method of connection. Wires should be stripped .25” (7mm), twisted
and inserted in the round hole while opening the clamp by pushing a
screwdriver in the adjacent rectangular hole, or by pushing a screwdriver into
the hole on the side of the connector. Remove the screwdriver to close the
clamp making sure the clamp grips the wire rather than the plastic insulation.
If there is a need to insert more than one wire in a terminal when using
multistrand wire, twist the conductors together first. If using solid wires, either
solder or crimp wires together before insertion. For RS-485 connections note
that the RS-232 terminals double up as a secondary connection, so it is rare to
have multiple conductors in one terminal as both sets of connections can be
used either for forming an RS-485 daisy-chain or for adding termination
resistors at each end of a network.
When making connections to the datalogger always insure power to the
datalogger is switched off and connect the ground (G) connection first. Below
is a table showing all the connections on the SDM-SIO1. There are a number
of pins that are common within the unit. These are also shown below.
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